MESON Chess Problem Database
Problem Display
PID: 48288 (1B6/Q5p1/5pNp/5R1K/3qp3/2p1kp1n/2R5/2N5 w - - 0 1)
Howard, Kenneth Samuel
Comm., USA National Chess Federation 01. Ty., 1928
#2
7 + 9
| 5089 | The Enjoyment of Chess Problems | 1943 |
SOLUTION
- SOUND
- Sets
- 1...Qc5
- 2.Qxc5#
- 1...Qb6
- 2.Qxb6#
- 1...Qxa7
- 2.Bxa7#
- 1...Sg1
- 2.Bf4#
- 1...Sf2
- 2.Bf4#
- 1...Sf4+
- 2.Bxf4#
- 1...Sg5
- 2.Bf4#
- 1...f2
- 2.Re2#
- 1...Qc5
- Tries
- 1.Kh4?
- 1...Qxa7
- 2.Bxa7#
- 1...Qc5
- 2.Qxc5#
- 1...Qb6
- 2.Qxb6#
- 1...Sg1
- 2.Bf4#
- 1...Sf2
- 2.Bf4#
- 1...Sf4
- 2.Bxf4#
- 1...Sg5
- 2.Bf4#
- 1...f2
- 2.Re2#
- 1...h5!
- 1...Qxa7
- 1.Sf4?
- threat
- 2.Sd5#
- 1...Sxf4+
- 2.Bxf4#
- 1...Qxa7
- 2.Bxa7#
- 1...Qc5
- 2.Qxc5#
- 1...Qb6
- 2.Qxb6#
- 1...g6+!
- threat
- 1.Se7?
- threat
- 2.Sd5#
- 1...Sf4+
- 2.Bxf4#
- 1...Qxa7
- 2.Bxa7#
- 1...Qc5
- 2.Qxc5#
- 1...Qb6
- 2.Qxb6#
- 1...g6+!
- threat
- 1.Bh2?
- 1...Sf4+
- 2.Bxf4#
- 1...Qc5
- 2.Qxc5#
- 1...Qb6
- 2.Qxb6#
- 1...Sg1
- 2.Bf4#
- 1...Sf2
- 2.Bf4#
- 1...Sg5
- 2.Bf4#
- 1...f2
- 2.Re2#
- 1...Qxa7!
- 1...Sf4+
- 1.Bg3?
- 1...Sf4+
- 2.Bxf4#
- 1...Qc5
- 2.Qxc5#
- 1...Qb6
- 2.Qxb6#
- 1...Sg1
- 2.Bf2#
- 2.Bf4#
- 1...Sf2
- 2.Bxf2#
- 2.Bf4#
- 1...Sg5
- 2.Bf2#
- 2.Bf4#
- 1...f2
- 2.Re2#
- 1...Qxa7!
- 1...Sf4+
- 1.Bd6?
- 1...Sf4+
- 2.Bxf4#
- 1...Qc5
- 2.Bxc5#
- 2.Qxc5#
- 1...Qb6
- 2.Qxb6#
- 1...Sg1
- 2.Bf4#
- 1...Sf2
- 2.Bf4#
- 1...Sg5
- 2.Bf4#
- 1...f2
- 2.Re2#
- 1...Qxa7!
- 1...Sf4+
- 1.Bc7?
- 1...Sf4+
- 2.Bxf4#
- 1...Qc5
- 2.Qxc5#
- 1...Qb6
- 2.Bxb6#
- 2.Qxb6#
- 1...Sg1
- 2.Bf4#
- 1...Sf2
- 2.Bf4#
- 1...Sg5
- 2.Bf4#
- 1...f2
- 2.Re2#
- 1...Qxa7!
- 1...Sf4+
- 1.Ra2?
- 1...Sf4+
- 2.Bxf4#
- 1...Qxa7
- 2.Bxa7#
- 1...Qc5
- 2.Qxc5#
- 1...Qb6
- 2.Qxb6#
- 1...Sg1
- 2.Bf4#
- 1...Sf2
- 2.Bf4#
- 1...Sg5
- 2.Bf4#
- 1...f2
- 2.Re2#
- 1...c2!
- 1...Sf4+
- 1.Rd5?
- threat
- 2.Qxd4#
- 1...Sf4+
- 2.Bxf4#
- 1...Qxa7
- 2.Bxa7#
- 1...Qc5
- 2.Qxc5#
- 1...Qb6
- 2.Qxb6#
- 1...f2!
- threat
- 1.Rxf6?
- 1...Qc5+
- 2.Qxc5#
- 1...Sf4+
- 2.Bxf4#
- 1...Qxa7
- 2.Bxa7#
- 1...Qb6
- 2.Qxb6#
- 1...Sg1
- 2.Bf4#
- 1...Sf2
- 2.Bf4#
- 1...Sg5
- 2.Bf4#
- 1...f2
- 2.Re2#
- 1...gxf6!
- 1...Qc5+
- 1.Qc5?
- 1...Sf4+
- 2.Bxf4#
- 1...Sg1
- 2.Bf4#
- 1...Sf2
- 2.Bf4#
- 1...Sg5
- 2.Bf4#
- 1...f2
- 2.Re2#
- 1...Qxc5!
- 1...Sf4+
- 1.Qb6?
- 1...Sf4+
- 2.Bxf4#
- 1...Qc5
- 2.Qxc5#
- 1...Sg1
- 2.Bf4#
- 1...Sf2
- 2.Bf4#
- 1...Sg5
- 2.Bf4#
- 1...f2
- 2.Re2#
- 1...Qxb6!
- 1...Sf4+
- 1.Kh4?
- Keys
- 1.Rc5!
- threat
- 2.R5xc3#
- 1...Qxc5+
- 2.Qxc5#
- 1...Qe5+
- 2.Rxe5#
- 1...Qd5+
- 2.Rxd5#
- 1...Sf4+
- 2.Bxf4#
- 1...Qc4
- 2.Rxc4#
- 1...Sf2
- 2.Bf4#
- threat
- 1.Rc5!
FEATURES
- Static
- TYPE = BLOCK_THREAT
- CHANGED MATES = 0
- ADDED MATES = 3
- REMOVED MATES = 5
- Sets
- Q(e);OGATEB,P_PINR(C)::QAB(F),XQ(e)
- Q(e);OGATEB::QAB(F),XQ(e)
- Q(e);N_SPINQ(e),OGATE,XQ(F)::B(G),XQ(e)
- S(d);N_GUARD::B(G)
- S(d);CHECK,N_GUARD::B(G),XS(d)
- P(c);N_GUARD::R1(B)
- Tries
- Try
- K(D);P-FLIGHT
- Vars
- Q(e);N_SPINQ(e),OGATE,XQ(F)::B(G),XQ(e)
- Q(e);OGATEB::QAB(F),XQ(e)
- S(d);N_GUARD::B(G)
- S(d);N_GUARD::B(G),XS(d)
- P(c);N_GUARD::R1(B)
- Refutation
- P(h);
- Try
- S(E);
- Threat
- S(E)
- Vars
- S(d);CHECK,OGATE,XS(E)::B(G),XS(d)
- Q(e);N_SPINQ(e),OGATE,XQ(F)::B(G),XQ(e)
- Q(e);OGATEB,P_PINR(C)::QAB(F),XQ(e)
- Q(e);OGATEB::QAB(F),XQ(e)
- Refutation
- P(i);CHECK
- Try
- S(E);
- Threat
- S(E)
- Vars
- S(d);CHECK,N_GUARD::B(G),XS(d)
- Q(e);N_SPINQ(e),OGATE,XQ(F)::B(G),XQ(e)
- Q(e);OGATEB,P_PINR(C)::QAB(F),XQ(e)
- Q(e);OGATEB::QAB(F),XQ(e)
- Refutation
- P(i);CHECK
- Try
- B(G);
- Vars
- S(d);CHECK,N_GUARD::B(G),XS(d)
- Q(e);OGATEB,P_PINR(C)::QAB(F),XQ(e)
- Q(e);OGATEB::QAB(F),XQ(e)
- S(d);N_GUARD::B(G)
- P(c);N_GUARD::R1(B)
- Refutation
- Q(e);N_SPINQ(e),XQ(F)
- Try
- B(G);
- Vars
- S(d);CHECK,N_GUARD::B(G),XS(d)
- Q(e);OGATEB,P_PINR(C)::QAB(F),XQ(e)
- Q(e);OGATEB::QAB(F),XQ(e)
- P(c);N_GUARD::R1(B)
- Refutation
- Q(e);N_SPINQ(e),XQ(F)
- Try
- B(G);
- Vars
- S(d);CHECK,N_GUARD::B(G),XS(d)
- Q(e);OGATEB::QAB(F),XQ(e)
- S(d);N_GUARD::B(G)
- P(c);N_GUARD::R1(B)
- Refutation
- Q(e);N_SPINQ(e),XQ(F)
- Try
- B(G);
- Vars
- S(d);CHECK,N_GUARD::B(G),XS(d)
- Q(e);OGATEB,P_PINR(C)::QAB(F),XQ(e)
- S(d);N_GUARD::B(G)
- P(c);N_GUARD::R1(B)
- Refutation
- Q(e);N_SPINQ(e),XQ(F)
- Try
- R(B);
- Vars
- S(d);CHECK,N_GUARD::B(G),XS(d)
- Q(e);N_SPINQ(e),OGATE,XQ(F)::B(G),XQ(e)
- Q(e);OGATEB,P_PINR(C)::QAB(F),XQ(e)
- Q(e);OGATEB::QAB(F),XQ(e)
- S(d);N_GUARD::B(G)
- P(c);N_GUARD::R1(B)
- Refutation
- P(a);
- Try
- R(C);
- Threat
- QAB1(F),XQ(e)
- Vars
- S(d);CHECK,N_GUARD::B(G),XS(d)
- Q(e);N_SPINQ(e),OGATE,XQ(F)::B(G),XQ(e)
- Q(e);OGATEB,P_PINR(C)::QAB(F),XQ(e)
- Q(e);OGATEB::QAB(F),XQ(e)
- Refutation
- P(c);
- Try
- R(C);XP(g)
- Vars
- Q(e);CHECK,OGATEB::QAB(F),XQ(e)
- S(d);CHECK,N_GUARD::B(G),XS(d)
- Q(e);N_SPINQ(e),OGATE,XQ(F)::B(G),XQ(e)
- Q(e);OGATEB::QAB(F),XQ(e)
- S(d);N_GUARD::B(G)
- P(c);N_GUARD::R1(B)
- Refutation
- P(i);XR(C)
- Try
- Q(F);
- Vars
- S(d);CHECK,N_GUARD::B(G),XS(d)
- S(d);N_GUARD::B(G)
- P(c);N_GUARD::R1(B)
- Refutation
- Q(e);N_SPINQ(e),P_PINR(C),XQ(F)
- Try
- Q(F);
- Vars
- S(d);CHECK,N_GUARD::B(G),XS(d)
- Q(e);OGATEB,P_PINR(C)::QAB(F),XQ(e)
- S(d);N_GUARD::B(G)
- P(c);N_GUARD::R1(B)
- Refutation
- Q(e);N_SPINQ(e),XQ(F)
- Try
- Actual
- R(C);N_PINQ(e)
- Threat
- R(C),XP(a)
- Vars
- Q(e);CHECK,OGATE,P_SPINQ(e),XR(C)::QAB(F),XQ(e)
- Q(e);CHECK,OGATEB::QAB(F)+R(C),XQ(e)
- S(d);CHECK,N_GUARD::B(G),XS(d)
- Q(e);OGATEB::QAB(F)+R(C),XQ(e)
- S(d);N_GUARD::B(G)
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).